Searched for: subject%3A%22Ducts%22
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Hoogerdijk, Tom (author)
Hydrogen is seen as a potential energy carrier for the next generation of aircraft that will be more climate-friendly than the previous generation of kerosene-powered aircraft. Two types of hydrogen-based propulsion systems are currently foreseen for such aircraft: hydrogen combustion and hydrogen fuel cell. In addition to producing useful...
master thesis 2023
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Scoccimarro, Antonio (author)
Hydrogen fuel cells are set to play an important role in decarbonizing the aviation sector. They operate at higher efficiencies than turbine engines, but their low operating temperature requires a dedicated thermal management system. The added drag, weight and parasitic power of such a system has a high impact on aircraft performance and its...
master thesis 2023
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Winiarczyk, Kevin (author)
Nowadays, air ducts components for ventilation used in offices, hospitals and schools are made from non-renewable materials mainly sheet metal and plastics. Continuing to feed the high demand of metals is a challenge and could result of depletion of natural resources. This raises the importance to look into renewable resources with a lower...
master thesis 2023
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Koster, Max (author)
In order to gain more insight into the effects of propeller ducts on quadrotors in forward flight, this research analyses flight data obtained from free flight tests, performed in the Cyberzoo and the Open Jet Facility of the TU Delft. Using a quadrotor platform with detachable propeller ducts, both trimmed forward flight tests and flights...
master thesis 2022
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Jiang, Hanjie (author), Zhou, Y. (author), Ho, H.W. (author)
Urban air mobility is a relatively new concept that has been proposed in recent years as a means of transporting passengers and goods in urban areas. It encompasses a diverse range of Vertical TakeOff and Landing (VTOL) vehicles that function more like passenger-carrying drones for on-demand transportation. Among them, the car-like VTOL is...
journal article 2022
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Rol, M.P. (author), Nijboer, Ronald (author), Yarovoy, Alexander (author)
Electromagnetic (EM) waves propagate through the atmosphere where they are refracted depending on the composition of the atmosphere. This refraction highly influences the propagation of the EM-waves. Certain atmospheric conditions can cause EM-waves to get trapped within a duct. In these ducts blind zones may occur, where there is no EM-wave...
conference paper 2022
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Liu, Zhengxuan (author), Xing, Chaojie (author), Zeng, Chao (author), Zhou, Yuekuan (author)
Geothermal energy (GE), as an ideal renewable resource for building cooling/heating with stability and abundance in energy supply, has been widely exploited in developing countries. The common utilization forms of GE mainly include the ground source heat pump (GSHP), underground duct system (UDS), and abandoned wells energy (AWE) system....
book chapter 2022
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Goudswaard, Reinier (author)
The growing demand for efficient propulsion systems that operate primarily in hover, has led the ducted rotor configuration to emerge as an increasingly popular design solution. One of the major design parameters for the ducted-rotor assembly is the radial distance between the blade tip and the circumferential wall of the duct, referred to as...
master thesis 2021
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Adib, Emad (author)
A new aircraft configuration, the Delft University Unconventional Configuration (DUUC), was recently invented by the Flight Performance and Propulsion group at TU Delft. As a solution to the concerns regarding the environmental and health impact due to increasing demand of air travel. The DUUC has a characteristic feature which consist of two...
master thesis 2021
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van Ruiten, Martijn (author)
Hydrokinetic energy is an environmentally friendly source of electricity and it has the advantage to be more predictable compared to other renewables. According to IRENA (2020), the capacity of converting hydrokinetic energy into electricity is expected to increase in the coming decades as many concepts are in the pipeline. One of these...
master thesis 2021
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Nechifor, Alexandru (author)
Directional flight handling and stability characteristics of the Delft University Unconventional Configuration (DUUC) were assessed by means of an inhouse designed and built mobile wind tunnel setup. The DUUC aircraft features an integrated ducted fan propulsive empennage (DFPE) that replaces the entire horizontal and vertical tails for...
master thesis 2021
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Stavreva, M.N. (author)
Flight Performance and Propulsion department of Aerospace Engineering, Delft University of Technology has proposed an effective and sustainable solution to the main challenges aviation is currently facing, namely the raising concerns regarding the environmental and health impact of the industry. Delft University Unconventional Concept (DUUC) has...
master thesis 2020
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Gierens, Lena (author)
During their service live reinforced and prestressed concrete structures experience deterioration. Therefore, to effectively assure the safety and durability of the compounds, non destructive testing methods, such as Ground Penetrating Radar, employed at high frequencies, provide a rapid assessment of the geometry of the compound. Although...
master thesis 2020
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Dighe, V.V. (author), Avallone, F. (author), van Bussel, G.J.W. (author)
Ducted Wind Turbines (DWTs) can be used for energy harvesting in urban areas where non-uniform inflows might be the cause of aerodynamic and acoustic performance degradation. For this reason, an aerodynamic and aeroacoustic analysis of DWTs in yawed inflow condition is performed for two duct geometries: a baseline commercial DWT model, DonQi®...
journal article 2020
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Avallone, F. (author), Ragni, D. (author), Casalino, D. (author)
Lattice-Boltzmann Very-Large-Eddy Simulations of two Diffuser-Augmented Wind Turbines are carried out to investigate the effect of the tip-clearance (TC) ratio on both the flow field and the far-field noise. The DonQi® wind turbine, a three blades ducted rotor with nominal TC of 2.5%, is chosen as reference test case. The second configuration...
journal article 2020
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Dighe, V.V. (author)
Ducted Wind Turbines (DWTs) are one of the many concepts that have been proposed to improve the energy extraction from wind in comparison to bare wind turbines. In reviewing the DWT studies, investigations based on the combined use of theoretical, computational, and experimental techniques have been presented. Although indicated in these studies...
doctoral thesis 2020
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Voogd, Alan (author)
This thesis experimentally assesses the benefit of Boundary Layer Ingestion (BLI) at the unaccelerated condition (thrust equals drag) of an integrated system in an industrial wind tunnel setting. The boundary layer or wake flow of the fuselage is ingested by the propulsor. Previous research shows that ingesting the boundary layer can lead to...
master thesis 2020
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Modesti, D. (author)
We carry out a priori tests of linear and nonlinear eddy viscosity models using direct numerical simulation (DNS) data of square duct flow up to friction Reynolds number Re <sub>τ</sub>= 1055. We focus on the ability of eddy viscosity models to reproduce the anisotropic Reynolds stress tensor components a<sub>ij</sub> responsible for...
journal article 2020
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Türkcan, Okan Fehmi Saban Fred (author)
This thesis focuses on the development of a computational model for early-stage design decision support of naturally ventilated terminal structures. The model is developed in a parametric Rhino Grasshopper environment paired with Python coding and CFD analyses through OpenFOAM. Optimization of air distribution parameters is performed with...
master thesis 2019
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Sharma, Nikhil (author)
Rising carbon emissions and the International Maritime Organisation (IMO) have put immense pressure on ship owners to make ships more efficient. One way to make ships more efficient is to install an energy saving device (ESD). ESDs are designed to perform at vessel’s design speed and design draft. Thus, there is abundant information available on...
master thesis 2019
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